Abstract
A combined, binary PPM/orthogonal modulation is used in cellular CDMA reverse links in which the multipath-diversity performance for Rayleigh-fading channels is evaluated and compared. As for diversity techniques, equal gain combining (EGC), selection combining (SC), and its generalization, second or third order SC (SC2, SC3), are considered for noncoherent reception. Theoretical analyses show that noncoherent combining loss (NCL) severely degrades the symbol error-rate (SER) performance of EGC when the modulation level M is small, but NCL can be greatly reduced by increasing M≥16. We also find that SC2 and SC3 significantly improve the SER compared to SC, especially outperform EGC for small M.
| Original language | English |
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| Pages | 781-785 |
| Number of pages | 5 |
| State | Published - 1998 |
| Externally published | Yes |
| Event | Proceedings of the 1998 IEEE 5th International Symposium on Spread Spectrum Techniques & Applications, IEEE ISSSTA. Part 3 (of 3) - Sun City, S Afr Duration: 2 Sep 1998 → 4 Sep 1998 |
Conference
| Conference | Proceedings of the 1998 IEEE 5th International Symposium on Spread Spectrum Techniques & Applications, IEEE ISSSTA. Part 3 (of 3) |
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| City | Sun City, S Afr |
| Period | 2/09/98 → 4/09/98 |